Fire-escape



' (No Model.)

. '10] LUND.

FIRE ESCAPE. 7

Patented Apr; 5, 1887.

WITNESSES ATENT men.

JOHN G. LUND, OF EAU CLAIRE, \VISCONSIN.

FIRE-ESCAPE.

SPECIFICATION forming part of Letters Patent No. 360,810, dated April 5, 1887.

Application filed September 20, 1886. Serial No. 214,015. (No model.)

' ings, which form a part of this specification,

and in which t Figure 1 is a front view showing my improved fire-escape applied in a Window-frame. Fig. 2 is afront View of the yoke of the escape. Fig. 3 is a vertical longitudinal sectional view of the same, and Fig. 4 is a top view of the yoke.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to that class of fireescapes in which a rope passes over pulleys having suitable brake mechanism for stopping the rope, and in which the rope is provided with two loops or stirrups and one waist-belt to be used by a descending person; and it consists in the improved construction and combination of parts of such a fire-escape, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates a yoke formed by two side plates, B B, united at their ends to form trunnions O O, secured in the outer ends of brackets D D, secured to the upper portions of the jambs of a window-frame. Journal-boltsEEpassthrough the ends of the plates and have grooved pulleys F F journaled'upon them, and convex rope-guides G G are pivoted near their outer ends between the plates, near the pulleys, and have the rope H, which passes over the pulleys, passing under them, bearingagainst them. The free inner ends of these curved guides bear against the ends of an obtusely-bent yoke, I, having the lower end of a coiled spring, J, bearing against it, the said coiled spring being inclosed in a cylindrical casing, K, formed in the center of the side plates and having a small.

block or plate, L, bearing against its upper end, having a perforated lip, M, projecting through a vertical slot, N, in one of the side plates.

A rope-guide, O, is secured below the obthe under side of a plate or block, R, having a perforated lip, S, projecting out through a slot, '1, in the casing. The lower end of this coiled spring bears against the inner ends of two levers or arms, U-U, which are pivoted be tween the side plates of the yoke at their middles, and have their outer ends slightly curved and bearing with their inner concave sides against the rope, clamping it between them and the curved and pivoted rope-guides.

A rod, V, is journaled in a perforated lip, WV, upon one side of one of the side plates, and has screw-threaded portions X X above and below that point, which fit and turn in the female-threaded perforations in the lips projecting from the plates or blocks upon the coiled springs, and the lower end. of this rod is provided wit-h a cross'handle, Y, by means of which it may be turned, sothat by turning the screw-threaded rod the springs may be tightened or loosened, pressing with greater or less force upon the rope.

The upper perforated lip upon the upper spring is provided with a laterally-projecting index, which points to a series of figures upon a graduated plate, Z, so that the pressure of the springs may be indicated by the index upon the plate.

It will be seen that by turning the threaded rod the tension of the springs, and consequently the tension of the several brakes within the yoke, may be adjusted, so that a person may descend in one of the slings, A, or seats upon the rope with a suitable and safe speed; and when it is desired to descend in one sling while another person ascends in the opposite sling, sufficient tension may be placed upon the rope, if the person ascending is considerably heavier than the person descending, it being of course necessary to have a person heavier than the person ascending to descend.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States 1. In a fire-escape, the combination of a yoke or long casing having two pulleys journaled in its ends and having upper curved guides in its arms and a central lower guide, an upper bent yoke bearing toward the central guide, a spring forcing the said yoke down, levers having their outer concave arms hear ing toward the curved upper guides and having a spring hearing against the inner arms of the levers, and a rope passing overthepulleys and between the guides and the upper yoke and curved lever-arms, as and for the purpose shown and set forth.

2. In a fire-escape, the combination of a yoke or long casing secured to the ends of brackets with its ends and having pulleys journaied in its ends, curved guide-plates secnredwith their convex sides facing downward in the arms of the casing, a curved central guide secured in the casing with its convex side upward, an ohtnselyhent bar having a coiled spring hearing with the lower end against it in the centrai portion of the easing, a plate or block beari ng agai nst this spring and havinga femalethreadcd perforation in a lip at its side pro their outer arms curved slightly upward, a

spring within a casing having its lower end bearing against the inner ends of the lovers, a plate or block bearing against the upper end of the spring and having a lip projecting out through a vertical slot formed with a femalethreaded perforation, a rope passing over the pulleys and through the casing between the guides, and a rod having a cross-handle and journaled in a lip upon the side of the yoke, having threaded portions fitting in the perforations of the lips, as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto aflixed my signature in presence of two witnesses,

JOHN C. LUND.

Witnesses: A. C. LARSON,

JNO. 1B. FLEMING. 

